Surname List: Begins with O


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All surnames beginning with O, sorted alphabetically (total individuals):

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1. o 'Beolan (2)
2. o 'Brien (1)
3. o 'Callaghan (8)
4. o' Bannon (1)
5. o' Bell (9)
6. o' Beolain (1)
7. o' Boyle (1)
8. o' Breen (18)
9. o' Brennan (1)
10. o' Brian (12)
11. o' Brien (222)
12. o' Brien de Thomond (3)
13. o' Brien-Ara (1)
14. o' Bryan (5)
15. o' Bryen (4)
16. o' Byrne (4)
17. o' Caerbhaill (1)
18. o' Cahan (5)
19. o' Callaghan (20)
20. o' Carrol (1)
21. o' Carroll (7)
22. o' Cavanagh (2)
23. o' Cearbhall (2)
24. o' Cheinnselaig (14)
25. o' Chennselaig (1)
26. o' Chorb (1)
27. o' Chuind (1)
28. o' Conaing (1)
29. o' Connell (60)
30. o' Conner (1)
31. o' Conners (1)
32. o' Connor (60)
33. o' Connor-Kerry (1)
34. o' Conor (4)
35. o' Conor Sligo (1)
36. o' Crega (1)
37. o' Cuillen (1)
38. o' Daire Rainey (1)
39. o' Dea (2)
40. o' Dell (5)
41. o' Dennel (1)
42. o' Docherty (2)
43. o' Donell (1)
44. o' Donnagan (1)
45. o' Donnel (1)
46. o' Donnell (18)
47. o' Donnell von Tyrconell (3)
48. o' Donoghue (1)
49. o' Donovan (3)
50. o' Draine (1)
51. o' Duibhne (1)
52. o' Dungalaig (1)
53. o' Duraghy (1)
54. o' Eagra (1)
55. o' Eidin (1)
56. o' Fallon (2)
57. o' Faolain (2)
58. o' Farrell (2)
59. o' Felan (1)
60. o' Ferral (1)
61. o' Ferrall-Boy (2)
62. o' Flaherty (4)
63. o' Fogarty (1)
64. o' Fogurty (1)
65. o' Garvey (2)
66. o' Grady (41)
67. o' Hagan (3)
68. o' Halloran (1)
69. o' Hara (28)
70. o' Hartigan (1)
71. o' Hea (1)
72. o' Hegerty (4)
73. o' Kane (2)
74. o' Keefe (5)
75. o' Keeff (1)
76. o' Keeley (3)
77. o' Kelly (6)
78. o' Kennedy (8)
79. o' Key (1)
80. o' Killey (1)
81. o' Knightley (2)
82. o' Lalor (1)
83. o' Lavery (2)
84. o' Leary (6)
85. o' Lorcain (1)
86. o' Loughnan (1)
87. o' Madden (2)
88. o' Mahony (1)
89. o' Maille Owen (1)
90. o' Maillend (3)
91. o' Malia (1)
92. o' Malley (3)
93. o' Mara (10)
94. o' Meagber (1)
95. o' Mealy (1)
96. o' Melaghlin (5)
97. o' Moore (14)
98. o' Morda (1)
99. o' More (5)
100. o' Mullane (1)
101. o' Mulloy (1)
102. o' Mulyran (1)
103. o' Murphy (1)
104. o' Neal (11)
105. o' Neale (3)
106. o' Neall (9)
107. o' Neil (3)
108. o' Néill (105)
109. o' Neill de Tyrone (1)
110. o' Nolan (1)
111. o' Phelan (1)
112. o' Pluingceid (1)
113. o' Quin (1)
114. o' Rear (1)
115. o' Regan (1)
116. o' Reilly (5)
117. o' Rorke (4)
118. o' Rourk (2)
119. o' Rourke (1)
120. o' Ruarc (5)
121. o' Ryn (1)
122. o' Shaughnessy (7)
123. o' Sullivan (14)
124. o' Sullivan Beare (2)
125. o' Tard la Grange-Keith (1)
126. o' Toole (16)
127. O'Blennis (1)
128. Oachs (4)
129. Oadham (2)
130. Oak (1)
131. Oakden (1)
132. Oakes (33)
133. Oakey (5)
134. Oakleaf (1)
135. Oakley (16)
136. Oaks (6)
137. Oates (5)
138. Obachah (1)
139. Obama (5)
140. Obanion (1)
141. Obbard (1)
142. Obbema (1)
143. Obbens (1)
144. Obdam (1)
145. Obedience (1)
146. Obelink (1)
147. Obelitz (1)
148. Obell (1)
149. Oben (2)
150. Obenberg (1)
151. Obeniche (1)
152. Ober (7)
153. Oberacker zu Sieghartsstein (1)
154. Oberembt (2)
155. Oberhlotzer (1)
156. Oberholster (16)
157. Oberholzer (6)
158. Oberleuter von Lassing (1)
159. Oberlin (2)
160. Oberländer (4)
161. Obermair (2)
162. Obermayer (2)
163. Obermeyer (1)
164. Obernaür (1)
165. Oberstadt (1)
166. Obertacke (1)
167. Oberti (2)
168. Obijn (1)
169. Obolenska (1)
170. Obolenskaia (1)
171. Obolenskaja (1)
172. Obolensky (18)
173. Obolensky-Neledinsky-Meletzky (4)
174. Oboussier (1)
175. Obreen (2)
176. Obrenović (7)
177. Obrenovic (7)
178. Obrist (1)
179. Obukova (1)
180. Occo (1)
181. Och (1)
182. Ochoa de Ondategui (2)
183. Ochs von Gunzendorf (2)
184. Ochs von Sonnau & Reichersperg (2)
185. Ochsin von Gunzendorf (1)
186. Ochterlony (3)
187. Ocieska (1)
188. Ockel (2)
189. Ockens (4)
190. Ockers (14)
191. Ockers Cau (2)
192. Ockerse (7)
193. Ockersse (27)
194. Ockerz. (1)
195. Ockes (2)
196. Ockhorst (4)
197. Ockhuysen (1)
198. Ockinga (5)
199. Ockstee (1)
200. Ocskay de Ocsko (1)
201. Octavius (1)
202. Octon (1)
203. Odard (1)
204. Odart (5)
205. Odart de Rilly d'Oysonville (1)
206. Odberre (1)
207. Odde (1)
208. Oddie (6)
209. Odding (1)
210. Oddyle (2)
211. Odé (1)
212. Odell (18)
213. Odendaal (21)
214. Odendahl (1)
215. Odenhoven (1)
216. Odenthal (1)
217. Oder (3)
218. Odescalchi (29)
219. Odescalchi di Novara (1)
220. Odet (1)
221. Odette (1)
222. Odgers (1)
223. Odier (2)
224. Odijk (1)
225. Odilia (1)
226. Odinck (1)
227. Odingsells (3)
228. Odink (1)
229. Odino (1)
230. Odinot (2)
231. Odinsson (1)
232. Odiorne (1)
233. Odland (4)
234. Odling (1)
235. Odlum (2)
236. Odoe (1)
237. Odoevskaya (2)
238. Odoevsky (1)
239. Odom (4)
240. Odone (4)
241. Odor (1)
242. Odou (1)
243. Odoyevskaya (1)
244. Odrowazowna (1)
245. Odson (1)
246. Odum (1)
247. Odygd (3)
248. Oechslin (1)
249. Oedses (1)
250. Oedtsma (3)
251. Oedtsma van Juckema (3)
252. Oeheim (2)
253. Oehler (1)
254. Oehlmann (1)
255. Oehninger (1)
256. Oeijen (1)
257. Oelbermann (1)
258. Oeler (5)
259. Oelhafen (1)
260. Oeloffse (1)
261. Oelofse (17)
262. Oelrichs (5)
263. Oelwein (1)
264. Oem (27)
265. Oem van Papendrecht (1)
266. Oem van Wijngaarden (33)
267. Oem van Wijngaerden (6)
268. Oem van Wyngaerden (1)
269. Oem van Zevender (2)
270. Oemcens (1)
271. Oenema (4)
272. Oentses (1)
273. Oepkes (2)
274. Oerinck (1)
275. Oerlemans (3)
276. Oertgen (2)
277. Oerthling (1)
278. Oertwein (2)
279. Oertwin (1)
   280. Oesau (31)
281. Oesebrand (1)
282. Oeser (2)
283. Oessendorff (1)
284. Oest (9)
285. Oesterberg (1)
286. Oesterlen (1)
287. Oesterling (1)
288. Oestermann (3)
289. Oesters (1)
290. Oesterschmidt (1)
291. Oestherhaut (1)
292. Oeters van Maris (1)
293. Oetgens (10)
294. Oetgens van Waveren (5)
295. Oetgens van Waveren Pancras Clifford (16)
296. Oetgins (2)
297. Oetinger (2)
298. Oetker (9)
299. Oettingen (3)
300. Oettingen Ettinger-Halevi (1)
301. Oevermans (1)
302. Oexle von Friedenberg (1)
303. of Acre (1)
304. of Acton (2)
305. of Agade (2)
306. of Ailech (1)
307. of Albha (1)
308. of Alcester (1)
309. of Aleppo (1)
310. of Allardice (1)
311. of Aller (4)
312. of Allerdale (1)
313. of Anathoth (1)
314. of Androssan (1)
315. of Angeln (3)
316. of Angoulême (1)
317. of Angus (16)
318. of Antioch (1)
319. of Anu (1)
320. of Argyll (3)
321. of Argyllshire (12)
322. of Arimathaea (1)
323. of Armorica (2)
324. of Arrapachtis (1)
325. of Aspinall (4)
326. of Athol (5)
327. of Atholl (6)
328. of Babylon (3)
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331. of Bamborough (4)
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333. of Barenshill (2)
334. of Bedford (2)
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336. of Bermingham (1)
337. of Bernica (16)
338. of Bernicia (4)
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342. of Bodvel (1)
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345. of Bothwell (1)
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348. of Bristol (1)
349. of Britons (1)
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353. of Burlington (1)
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355. of Callendar (3)
356. of Cambridge (11)
357. of Cardigan (1)
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359. of Carlisle (1)
360. of Carrick (7)
361. of Cathcart (1)
362. of Chattan (10)
363. of Cheddar (1)
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365. of Chesterfield (1)
366. of Chisholm (1)
367. of Cimmerians (11)
368. of Cinneal Eoguin (1)
369. of Clarence (4)
370. of Colchester (1)
371. of Connacht (1)
372. of Connaught (4)
373. of Corbi (1)
374. of Cornwall (28)
375. of Cranntock (1)
376. of Cumbria (2)
377. of Dalradia (6)
378. of Deheubarth (1)
379. of Deira (2)
380. of Denia & Balearic (1)
381. of Denmark (2)
382. of Desmond (1)
383. of Devon (3)
384. of Dimitia (1)
385. of Docwra (1)
386. of Dol (5)
387. of Dorset (1)
388. of Douni (2)
389. of Draffen (1)
390. of Dublin (9)
391. of Dule (1)
392. of Dull (1)
393. of Dunbar (23)
394. of Durham (3)
395. of Dyfed (4)
396. of East Anglia (11)
397. of Eccles (2)
398. of Egypt (13)
399. of England (82)
400. of Essex (4)
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412. of Galbraith (2)
413. of Galicia (3)
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415. of Galloway (2)
416. of Gask (1)
417. of Gibeah (2)
418. of Gilsland (3)
419. of Gloucester (12)
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421. of Greece (1)
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429. of Haselden (5)
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432. of Hedemarken (1)
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435. of Holland (10)
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437. of Huntingdon (10)
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440. of Ireland (14)
441. of Isbell (2)
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447. of Jotbah (1)
448. of Judah (18)
449. of Jutland (3)
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451. of Kent (30)
452. of Khazaria (2)
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469. of Lincoln (3)
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471. of Lochaber (8)
472. of Lochore (1)
473. of Lorn (6)
474. of Lot (2)
475. of Lumley (7)
476. of Lundy (1)
477. of Luss (2)
478. of Lyon Logie (1)
479. of Macedonia (1)
480. of Man (5)
481. of Man & Dublin & the Isles (1)
482. of Mar (6)
483. of Marr (1)
484. of Mawddy (1)
485. of Meirionydd (2)
486. of Menteith (2)
487. of Menteth (2)
488. of Mercia (71)
489. of Mexico (2)
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491. of Misterton (1)
492. of Moab (2)
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497. of Monymusk (1)
498. of Moray (5)
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503. of Namur (1)
504. of Newton (2)
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508. of Northumberland (7)
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511. of Nottingham (2)
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513. of Orbe, Switzerland (1)
514. of Orkney (15)
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519. of Osrhoene (1)
520. of Ossory (3)
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532. of Ross (10)
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537. of Salisbury (3)
538. of Saltmarsh (1)
539. of Sanford (3)
540. of Scotland (73)
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546. of Shropshire (2)
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554. of Spain (2)
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557. of St. Sever (1)
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561. of Strathclyde (14)
562. of Strathearn (21)
563. of Strathnaver (2)
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567. of Talou (1)
568. of Tamworth (1)
569. of Tatshull (1)
570. of the Angles (3)
571. of the Aztecs (1)
572. of the Balearic Isles (1)
573. of the Baltic Goths (1)
574. of the Chaldees (1)
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577. of the Iceni (1)
578. of the Isle of Wight (1)
579. of the Isles (5)
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597. of Troy (41)
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599. of Ulster (6)
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601. of Ur & Agade (3)
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643. Ogden (133)
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